Slide carrier for still projectors



Jan. 9, 1951 K. w. HARPER 2,537,584

SLIDE CARRIER FOR STILL PROJECTORS Filed June 8, 1946 m VN L//////////V//////////////// I l l N f I i d' N l R, M U A 5 A 7 TOH/VEJV Patented Jan. 9, 19,51

SLIDE CARRIER FOR STILL PROJECTORS Kennard W. Harper, Buffalo, N. Y., assignor to American Optical Company, Southbridge, Mass., a voluntary association of Massachusetts Application June 8, 1946, Serial No. 675,421

6 Claims. 1

This invention relates to projection apparatus and more particularly to slide carriers `for properly positioning transparent lantern slidesand the like in proper position in a projector for projection purposes. y

One well-known form of slide carrier in common use at the present time is arranged as an elongated frame adapted to slide in channels or guideways in the projector and provided with two or more projection openings or apertures spaced longitudinally therein. These openings are so located in the carrier that a slide may be readily slipped into place overlying or aligned with one of the openings or removed therefrom while another slide is being projected. The slide supporting means on such carriers have to be of a definite size and shape in order to properly accommodate and center individual slides of a predetermined size in alignment with these projection openings. In cases where the slides are square they may be placed in the carrier with any edge uppermost. However, many slides are of rectangular shape and in such cases they can be placed in the carrier provided therefor in only a single position, generally with the longer dimension thereof extending longitudinally of the carrier. Since it is also often desirable that'certain of such slides be positioned in a projector With the longer side vertical, these carriers of earlier construction have not functioned as sat isfactory as might be desired.

The present invention, however, overcomes these difficulties mentioned above by providing a.

new and improved slide carrier arranged in the form of an elongatedframehaving spaced projection openings and this slide carrier is so'constructed and arranged that it may vreceiveand properly support a slide of a predetermined length and a different predetermined width. in alignment with each opening in either an upright position or upon one side edge as desired.

It is, therefore, an important object of this invention to provide a new and improved slide carrier arranged to support af-slide of differing length and width in a projector for projection purposes with the slide disposed in an upright position or upon one side edge thereof.

It is a further object of the invention `to provide an improved slide carrier of the type mentioned above which is of sturdy and economical construction and arranged with a minimum number of parts.

It is a further object of the invention to provide an improved slide carrier of the character described which may be easily formed, molded or cast and which requires a minimum amount of time and material for finishing same so as to be placed in condition for use.

Other objects and advantages of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawing, in which Fig. 1 is an elevational view of a slide carrier embodying the present invention;

Fig. 2 is a vertical sectional view taken substantially on line 2-2 of Fig. 1 and looking in the direction of the arrows; l

Fig. 3 is a fragmentary plan view on an enlarged scale of an end-portion of the slide carrier of Fig.i 1:

Fig. 4 is a fragmentary sectional view taken substantially on line 4-4 of Fig. 1 and looking in the direction of the arrows; and

Fig. 5 is a fragmentary sectional view taken substantially on line 5 5 of Fig. 1.

Referring to the drawing in detail, it will be seen that the slide carrier generally indicated by numeral lcomprises an elongated basel portion I2 extending between upstanding integral-endportions or arms i4 and I 6 which are arranged in spaced relation to -an integral upstanding intermediate portion or arm I8 so as to provide projection openings or apertures 20 and 22 at opposite sides of said intermediate portion I8. On the adjacent'edges of the end-portions and the intermediate portion are provided inwardly projecting integral flanges 24 and 25 respectively and flanges 26 are arranged to project upwardly from the base portion l2 adjacent projection openings 20 and 22. Side and bottom recesses 23 and 23' are thus formed in the carrier adjacent each opening 20 and 22 by the'projecting iianges 2d. 25

and 26. Spaces are thus formed between guide surfaces 24A and 25A for receiving lantern slides and the anges 24 and 25 are arranged to have the slides held thereagainst, by suitable means to be presently described, while the carrier and slides are being movedinto position in a projector for projection purposes.

As may be seen in Fig. 1 an integral proiection 28 is formed adjacent the intersection of the base portion I2 and each end-portion I4 and I6, said projections being integral with anges 24 and 26. A similar projection 39 is formed adjacent the junction of the base portion I2 and each side 25A of the intermediate portion I8. The projections 28 and 30 are of similar size and shape and each is arranged to support the lower ends of a relatively long movable arm or spring member 32 and a relatively shorter movable arm or spring the base portion I2 adjacent each of said projections 28 and 30. Each longer 4spring 32 is provided, as best seen by Fig. 2,'with 'an outwardly sloping upper end-portion 42 ftd-accommodate a slide as it is forced downwardly `between the flanges 24 and 25 and springs L32 and1-between :wf guide surfaces 24A and 25A into proper position for projection purposes. v

When a slide is so positionedin the carrier, vits longer dimension will be disposed longitudinally y of the carrier and its lower edge will be in engagement #with the upper surfaces JM and 46 :of the projections 28 :and e30 @respectively It-will-be noted that the lower edgeof-theslidein.suolmpesition extends .slightly below `the `upperedgeof .the iiange S26. An intermediate curved rportion .48 offeach ofthese springs `32.-bears vagainst aside of the slide and since tcurvedportions AB lengage the -slide intermediate the-ends of .the Avertically extending anges -2li-.and-25 `the slide will.belheld properly .in a vertical .pesitionin.engagementwith thesefanges.

Since the slides are-Voi 4a.lesser :predetermined width .than length, .the opposite inner edges :50 and 5x2-vof each pair of movable armsqorfspiings 32 are arranged in a predetermined spaced 1re1ation Vto `A-provide a lslidenreceiving 'space therebetween lto accommodate v:the shorter dimension of the slides. Edges enand. 52 tact-asiguidesas .a slide. is ypressed v, downwardly into ,place coiferlying the projection .opening 'or :Z2-and v.with @the shorter dimension -of .the -sl-ide extending `parallel tothe base portion 4?.. Theslide'maybednovcd downwardly until nits -loweredge `comes into `engagement with an edge lpcrtiorr-ci .thefslidecarr-ier-and `between .the vertical'l edgesE-ofsprojections .28- and 3.0. .The shorterisprings or .movable arms -311 .are .wider'vand .provided *with .outwardly .sloping supper .end-,portionsi `against which -the desired. It will bel-seen -tli'ata :square .-.slidef of difmensio-ns to t the spacingbetween theedgesi andA 52 of thesprings-32 may :belpositioned-therein -reither a vertica'lfposition .or 'on Tits iside and in either position be .properlylocatedsor Icentered for projectionzpurposes.

yIn the carrier disclosed Vin #Fig.fl'aagpairsofipro-i jection openings have been disclosedtfbutit will be obvious'thata slidecarrier?comprisingfagreater number Vof 'projection 'openings :mightmeadily :be provided with -thefpresent invention. JIlhe .Flower edge 0 of the `portion 'I2-serves -aslenide-.means forlthe slidey carrierwhenlpositioneddnlthe,guide- C opening,

ways or channels of a conventional projector and the upper end-portion B2 of intermediate member I8 is arranged to engage the upper oi such channels. Stop means in the form of pins 64 may be provided at opposite ends of the slide carrier for limiting the travel of the carrier in theprojector. L@'bviously othertypes of .limiting means may-be employed for such ypurposes and may even be arranged to be moved to an inoperative position to allow the carrier to be easily revmoved-from theprojector when not being used.

Whilethe lmain supporting or structural portion foi the Yfcarnierzmay be conveniently east in fmetal ormolde'd ofiplastic or the like as one integral 7memberjfit'will be obvious that such may be formed of aplurality of individual members,

. .olwoodormetalfor both, and adequately serve in thepresent invention. In such case, these parts would form a rigid unitary structure to which would be secured the springs 32 and 34, the stops 64 Y'and the VV"lian'dlesl upon 'the 'opposita'en'ds of vthe carrier. -1

-l-Iavingfdescribed itheinvention in detail, 1I sire --to secure'byf-Letters Patent .th-e ffollow'ing.

l. fA-:sli'de carrier-comprisingtin-elongated Arigid basefiortion, ajpaiir of Vupstanding'rigifilarms earried thereby and arranged `in -spaced relation so as 'to providerapro'jection miening "therebetween,y arecessineachfof said arms adjacent saidfopening, eeach'recess lbeing lformed J'in partj'by 'fa wer tical `ltransverse ywall and `a vert-ical longitudinal wall, `said transverse kwalls being vvspaced relative to 4each -'other lsofas Yto provide therebetween 'a slide-reeeiving VAspace 'o"f predetermined llcngitu` dina'l dimension, van'l'ova'ble arm in each Orsai-d recesses arranged `to 4yieldingly engage side oi a slide and "urge A"the 'Opposite 'side "thereof into engagement with said vertical longitudinal wall-ls when "occupying said Aspace Vand-overlying 'said openingftheadjacent edges 'of said movable Aarms being 'spaced relative toeach otherso as ltode'ine therebetween 'a "second slide-receiving space ol lesser predetermined longitudinal dimension, and a second :movable arm in 'each fof saiilrecesses' andarranged'to'yieldably engage asideo'a slide and urge the opposite side 'thereof into 'engage-g; ment with said Vvertical longitudinal `walls when occupying sai'd second Space 'and 'overlying said 2. A carrier forpssiuonmg a slide 4or meines in a -projector forprojection purposes, .said "carrier comprising Aan elongated rigi'dbaseportion, apairorigidupstanding,portions vcarried thereby.said upstanding portions being .arrangedlin spacedrelation relative Yto .each .other so aslto Idene-a slide-.receiving space. of ,predetermined llon-ll gitudinalV dimension therebetween, .inwardly pro-l j-ecting .vertically :disposedlanges-.carried .by upstanding ,portions land .having Aside .surfaces thereon arranged.for,engagementzbyea-side of a slide when-.occupyingsaidsspace and having the inner :edges thereof spacedV from reach .other .sofas to provide a.projection .opening `therebetween, ..a iirst pairof movablefarmsfsupportedby said ,car-g rier and positioned .inwardly .of said upstandirn;l portions .andfarranged to resiliently urge the slide occupyingrsai'd 'slide lreceivingspace :toward said flanges,the inner-edges of saidvmovablefarrnsfbef` ing :arranged I in .spaced relation irelative -to :nach other so as to dene a second slide-receiuing'space of :lesser predetermined longitudinal :dimension therebetween," and .a seenndI spair .ofimova'blarms supportedA by .saidz-carrierend-:arranged tosresili ently urge a slide when occupying said second space toward said flanges.

3. A slide carrier for selectively positioning a slide of dierent predetermined length and width in a projector with its longerY dimension disposed either longitudinally or vertically of the carrier as desired, said carrier comprising an elongated rigid base portion, a pair of rigid upstanding arms carried thereby, said arms being arranged in a predetermined spaced relation for dening a slidereceiving space therebetween suitable to accommodate the long dimension of said slide, inwardly projecting vertical ilanges carried by said upstanding arms and spaced from each other so as to define a projection opening therebetween, a pair of movable arms supported by said carrier and arranged to resiliently urge a side of said slide when occupying said space into engagement with said anges, the inner edges of said movable arms being arranged in such predetermined spaced relation between said upstanding arms as to dene a second slide-receiving space of a longitudinal dimension suitable to accommodate the shorter dimension of said slide therebetween, and a second pair of movable arms supported by said carrier and arranged to resiliently urge said slide when occupying said second space into engagement with said anges.

4. A slide carrier for selectively positioning a slide of a predetermined length and a different predetermined width in a projector with its longer dimension disposed longitudinally or vertically of said carrier as desired and centrally relative to a projection opening formed therein, said carrier comprising an elongated rigid base portion,

a pair of upstanding rigid arms carried thereby and arranged in spaced relation for providing said projection opening therebetween, a pair of Vertically extending recesses formed in said arms adjacent said opening, a longitudinal recess f formed in said base portion adjacent said opening, said pair of recesses providing transversely disposed walls so spaced relative to each other as to dene a slide-receiving space of predetermined longitudinal dimension therebetween and also' providing longitudinally disposed walls adjacent said opening, a movable arm in each recess of said pair of recesses for yieldable engagement with a side of a slide for urging the opposite side thereof into engagement with said longitudinally disposed walls when occupying said space and overlying said projection opening, the adjacent edges of said movable arms being so spaced relative to each other as to define a second slide-receiving space of lesser longitudinal dii mension between said movable arms, and a second movable arm in each recess of said pair of recesses and arranged to yieldably engage a side of a slide for urging the opposite side thereof into engagement with said longitudinally disposed walls when occupying said second space and overlying said projection opening, said longitudinal recess accommodating an edge portion of said slide so as to be properly located relative to said opening for projection purposes.

5. A slide carrier comprising an elongated rigid base portion, a pair of upstanding rigid arms arranged in spaced relation thereon for defining a slide-receiving space therebetween, spaced flanges projecting inwardly from said upstanding arms and dening a projection opening therebetween, movable arms positioned at opposite sides of said opening and arranged to yieldably maintain a slide when occupying said space in engagement with said flanges and overlying said opening, said movable arms being spaced from each other so as to define a second smaller slide-receiving space therebetween, second movable arms on said carrier and positioned adjacent opposite sides of said opening and arranged to overlie said first movable arms, said second movable arms having portions extending inwardly of said rst movable arms to provide means for engaging a side of a slide when occupying said second space and yieldably urging said slide into engagement with said flanges, whereby rectangular slides of a predetermined length and a different predetermined width may be selectively positioned in said carrier in an upright position or upon one of their side edges as desired for projection purposes.

6. A slide carrier comprising an elongated rigid base portion, a pair of rigid vertically disposed arms carried in spaced relation thereby, a vertically extending recess formed in each arm so as to provide a transverse vertical wall portion and a longitudinal vertical wall portion, said transverse wall portions being so spaced relative to each other as to dene a slide receiving space of predetermined longitudinal dimension therebetween, yieldable means supported by said carrier adjacent each recess and arranged to engage a side of a slide occupying said space so as to hold the opposite side thereof against said 1ongitudinal wall portions, the adjacent edge portions of said yieldable means dening a second slide receiving space of lesser predetermined longitudinal dimension, and additional yieldable means supported by said carrier adjacent each recess and arranged to engage a side of a slide occupying said second space so as to hold the opposite side thereof against said longitudinal .Wall portions of said recesses.

KENNARD W. HARPER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,139,165 Cobb May 11, 1915 2,153,221 Wittel Apr. 4, 1939 2,319,029 Babcock et al. May 11, 1943 

